/*
 * Copyright Bytedance Ltd. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package operator

import (
	"github.com/bytedance/arishem/tools"
)

// object operator

type NullOperator struct{}
type NotNullOperator struct{}

func (o *NullOperator) Operate(left, right interface{}) (bool, error) {
	return tools.IsNil(left), nil
}

func (n *NotNullOperator) Operate(left, right interface{}) (bool, error) {
	return !tools.IsNil(left), nil
}
